Additional file 1: Figure S1. Intra-subject, and inter-subject consistency. Table S1. The strength and direction of a linear relationship between the social touch behavior and total and three subscale scores of SRS-A. Figure S2. Brain areas involved in social vs. non-social touch observation. Table S2. Brain areas activated during the observation of social touch compared to non-social touch and vice versa. Figure S3. Brain areas showing increased neural activation for receiving touch. Table S3. Brain areas activated when receiving touch compared to resting. Table S4. The beta coefficients of the social/non-social and overall affective dimensions for all ROIs and both groups. Figure S4. Neural representations of motor responses made during the task (A) and of the pixel-wise intensity of the video frames (B).